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Can T1635-600G replace T3035H-6G?

Margaret
Associate

We selected the Triac ST# T1635-600G for refrigerator project, to control the compressor (inductive loads). Tested T1635-600G, the heat is very serious when passing 16A current, even using a heat sink temperature is more than 100°C. Therefore, I want to use T3035H-6G. May I ask how much heat sink is required for this model when it passes 16A? Or do you have app recommendations? Are there any guidelines on heat dissipation? Thank you!

3 REPLIES 3

Suggest you work with your local rep or support engineer, or submit this as an online support request rather than on the forum.

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AScha.3
Chief

just from ds : T16xx :

AScha3_0-1716792909172.png

T30xx :

AScha3_1-1716792976216.png

So at 16A : about 19W -> 16W dissipation with T16 -> T30 ; ( about 20% less , with T30 )

>how much heat sink is required for this model when it passes 16A?

About the same, as with T16 ; but choose T30xx (T16 is at its limit - never good idea !)

>Or do you have app recommendations?

You need more/better heat sink.

>Are there any guidelines on heat dissipation?

Same, as always : the cooler you keep the semiconductor, the longer it will be alive . 🙂

Here, with 16W loss and desired heat sink temp of about 60° C , at max. 30° ambient you need : (60-30)/16 = 1.8 °/W heat sink. (Or smaller heat sink with forced cooling, using a fan.)

Something like this : (100mm size)

AScha3_2-1716793997914.png

And be aware : triac is not isolated, so need isolated mounting and thermal grease !

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MarComDFD
ST Employee

Please choose the T3035H-6G because is a 150°C max Tj so better in term of dissipation.